World number 10 Sindhu took close to an hour to outwit Ongbumrungpan Busanan 14-21 21-13 21-10 to stretch her head-to-head record against the Thailand girl to 3-0, at the Gimcheon Indoor Stadium.
The 18-year-old, who had won the bronze medal at the World Championship last year, will next look to avenge her India Super Series loss to China's Shixian Wang, the two-time reigning All England Champion.
In the men's singles, rising shuttler R M V Gurusaidutt played his heart out before losing 24-22 9-21 13-21 to Liu Kai of China in a match that lasted for an hour.
Down 8-10 in the second, Sindhu produced cross court smashes and played well at the nets too, even as Busanan made a lot of errors.
In the third game, Sindhu dominated right from start and comfortably closed the door on her rival.
"Overall, it was a good match, Sindhu played very well apart from the first game. From the second game onwards, she was up and her smashes also improved and she dominated the third game," National coach Pullela Gopichand told PTI.
"I am sure she will play well tomorrow and beat Shixian. She is world number two but I think Sindhu knows what she has to do," he said.
India's top shuttler Saina Nehwal had won the bronze in the 2010 Asian badminton Championship at Siri Fort Stadium in New Delhi.
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